They are considered warlock spells for you, and they needn't be from the same spell list.
You spend a spell slot to cast a spell you shadow priest t10 set bonus know.
Some spells, such as Magic Missile and Cure Wounds, have more powerful Effects when cast at a higher level, as detailed in a spells description.Spells Known of 1st Level and Higher At 1st level, you know two 1st-level spells of your choice from the warlock spell list.When you gain certain warlock levels, you gain additional invocations of your choice, as shown in the Invocations Known column of the Warlock table.A cantrips Spell Level.You learn additional warlock cantrips of your choice at higher levels, as shown in the Cantrips Known column of the Warlock table.

The weapon ceases being your pact weapon if you die, if you perform the 1-hour ritual on a different weapon, or if you use a 1-hour ritual to break your bond.Such spells can grant an extra reserve of life force, drain the life energy from another creature, create the Undead, or even bring the dead back to life.Instantaneous Many spells are Instantaneous.When a character casts a spell, he or she expends a slot of that spells level or higher, effectively filling a slot with the spell.To cast the 1st-level spell Witch Bolt, you must spend one of those slots, and you cast it as a 3rd-level spell.The schools of magic help describe spells; they have no rules of their own, although some rules refer to the schools.A spells effect expands in straight lines from the point of Origin.Necromancy Necromancy spells manipulate the energies of life and death.When you Cast a Spell with a Casting Time longer than a single action or Reaction, you must spend your action each turn casting the spell, and you must maintain your Concentration while you do so (see Concentration below).To sum up, for a warlock: The spells you know dictate what you can use your spell slots for.Some spells specify that their Effects last until the spells are dispelled or destroyed.Targets A typical spell requires you to pick one or more Targets to be affected by the spells magic.107 Additionally, when you gain a level in this class, you can choose one of the warlock spells you know and replace it with another spell from the warlock spell list, which also must be of a level for which you have spell slots.Typically, a character has to be at least 17th level, not 9th level, to cast a 9th-level spell.Or they might someday be reinvented by a character who has amassed enough power and.At higher levels, you gain more warlock spells of your choice that can be cast in this way: one 7th-level spell at 13th level, one 8th-level spell at 15th level, and one 9th-level spell at 17th level.

All spellcasters, including warlocks, have a list of spells they can cast, through some combination of knowledge and preparation (the details vary by class).
Repeated practice has fixed the spell in the casters mind and infused the caster with the magic needed to produce the effect over and over.
Cone A cone extends in a direction you choose from its point of Origin.